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Idle Air Control Motor Circuits

NOTE: For circuit and connector terminal identification, see CONNECTOR IDENTIFICATION. For wiring diagrams, see WIRING DIAGRAMS - 2.5L TBI article in ENGINE PERFORMANCE.
  1. Turn ignition off. Disconnect Powertrain Control Module (PCM) connector. Inspect PCM connector for damaged or pushed out terminals. Repair as necessary. Perform TEST VER-2. If PCM connector terminals are okay, go to next step.
  2. Using an external ohmmeter, check resistance of Violet/Black wire between IAC motor connector and PCM connector terminal No. 59. If resistance is more than 5 ohms, repair open in Violet/Black wire. Perform TEST VER-2. If resistance is less than 5 ohms, replace PCM. Perform TEST VER-2.
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